Full subsystem codebase scan for identifying pre-existing issues?

Hi,

Is there a way for Sashiko to run a full scan of a subsystem/tree to
identify all the pre-existing issues so that they can be fixed
proactively? Currently, they're flagged on patch reviews, which can be
a bit frustrating for contributors who didn't introduce the problem,
and adds a bit of noise for maintainers/reviewers looking at the
Sashiko report.

Thanks,
Joanne